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                            CERT-Renater

                Note d'Information No. 2025/VULN265

_____________________________________________________________________

DATE                : 29/04/2025

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Systems running Apache Tomcat versions
                       prior to 11.0.6, 10.1.40, 9.0.104.

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https://lists.apache.org/thread/q4ld9xtv3zrvvs3ykp4b2f9j2tvhq6bl
https://lists.apache.org/thread/x7l5ldwkson33bf4b3s3738lwjql618z
_____________________________________________________________________

CVE-2025-31650 Apache Tomcat - DoS via invalid HTTP prioritization
header

Severity: High

Vendor: The Apache Software Foundation

Versions Affected:
Apache Tomcat 11.0.0-M2 to 11.0.5
Apache Tomcat 10.1.10 to 10.1.39
Apache Tomcat 9.0.76 to 9.0.102

Description:
Incorrect error handling for some invalid HTTP priority headers
resulted in incomplete clean-up of the failed request which created
a memory leak. A large number of such requests could trigger an 
OutOfMemoryException resulting in a denial of service.

Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- Upgrade to Apache Tomcat 11.0.6 or later
- Upgrade to Apache Tomcat 10.1.40 or later
- Upgrade to Apache Tomcat 9.0.104 or later

Note: This issue was fixed in Apache Tomcat 9.0.103 but the release
vote for the 9.0.103 release candidate did not pass. Therefore,
although users must download 9.0.104 to obtain a version that includes
a fix for this issue, version 9.0.103 is not included in the list of
affected versions.

Credit:
The vulnerability was identified by the Tomcat security team.

History:
2025-04-28 Original advisory

References:
[1] https://tomcat.apache.org/security-11.html
[2] https://tomcat.apache.org/security-10.html
[3] https://tomcat.apache.org/security-9.html

_____________________________________________________________________

[SECURITY] CVE-2025-31651 Apache Tomcat - Rewrite rule bypass
CVE-2025-31651 Apache Tomcat - Rewrite rule bypass

Severity: Low

Vendor: The Apache Software Foundation

Versions Affected:
Apache Tomcat 11.0.0-M1 to 11.0.5
Apache Tomcat 10.1.0-M1 to 10.1.39
Apache Tomcat 9.0.0.M1 to 9.0.102


Description:
For a subset of unlikely rewrite rule configurations, it was possible 
for a specially crafted request to bypass some rewrite rules. If those 
rewrite rules effectively enforced security constraints, those 
constraints could be bypassed.


Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- Upgrade to Apache Tomcat 11.0.6 or later
- Upgrade to Apache Tomcat 10.1.40 or later
- Upgrade to Apache Tomcat 9.0.104 or later

Note: This issue was fixed in Apache Tomcat 9.0.103 but the release
vote for the 9.0.103 release candidate did not pass. Therefore,
although users must download 9.0.104 to obtain a version that
includes a fix for this issue, version 9.0.103 is not included in
the list of affected versions.


Credit:
The vulnerability was identified by COSCO Shipping Lines DIC.


History:
2025-04-28 Original advisory

References:
[1] https://tomcat.apache.org/security-11.html
[2] https://tomcat.apache.org/security-10.html
[3] https://tomcat.apache.org/security-9.html


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